Author : J. Conor O'Shea
Publisher :
ISBN 13 :
Total Pages : 149 pages
Book Rating : 4.:/5 (795 download)
Book Synopsis Determinants of Ambulatory Blood Pressure Measurements by : J. Conor O'Shea
Download or read book Determinants of Ambulatory Blood Pressure Measurements written by J. Conor O'Shea and published by . This book was released on 1999 with total page 149 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ambulatory blood pressure monitoring (ABPM) is being used increasingly as a clinical tool in the evaluation of the hypertensive patient. By recording blood pressure at regular intervals over a 24 hour period, in the setting of an individual's routine day. ABPM overcomes two of the main sources of error associated with clinic blood pressure measurement, i.e. the spontaneous variability of blood pressure and the white coat hypertensive effect. In the research that follows, the objective was to examine ways in which the technique of ABPM can be further refined to provide more accurate and clinically relevant data. The first set of projects was concerned with the protocols used to evaluate the accuracy of these devices. While evaluating the Tycos Quiet-Trak ABP monitor according to the British Hypertension Society (BHS) protocol, the factors that could be manipulated to influence the outcome and the extent to which the participants mirrored clinical practice were evaluated. The most predictable confounding factor was the influence of physical activity on device performance during field testing. Accordingly, subjects wore electronic activity monitors to provide objective quantifiable estimates of physical activity during the ambulatory blood pressure recordings. The average activity score of the subjects who participated in the Phase III field testing (4915 units) was similar to that of the control population of 120 consecutive ABPM clinic patients (4315 units; p>0.50). Rejected measurements however, were associated with a significantly higher activity level at the time of BP estimation (88.436 vs 40.717; p